What are some key differences of Felicia Sterling and Stephen Clyde?

I think they came from different economic backgrounds but had similar dispositions. Both are kind people and want to serve God and the poor.

"It would be just the way of the world for those two people to come to like each other, though," thought the man to himself, and somehow the thought made him grave. It was almost like the old pang over Camilla. But it passed, leaving him afterwards, when Felicia had gone back, with tears in his eyes and a feeling that was almost hope that Felicia and Stephen would like each other. "After all," he said, like the sensible, good man that he was, "is not romance a part of humanity? Love is older than I am and wiser."